O'Reilly logo

The Art of Unit Testing: with Examples in .NET by Roy Osherove

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Preface

One of the biggest failed projects I worked on had unit tests. Or so I thought. I was leading a group of programmers creating a billing application, and we were doing it in a fully test-driven manner—writing the test, then writing the code, seeing the test fail, making the test pass, refactoring, and starting all over again.

The first few months of the project were great. Things were going well, and we had tests that proved that our code worked. But as time went by, requirements changed. We were forced to change our code to fit those new requirements, and when we did, tests broke and had to be fixed. The code still worked, but the tests we wrote were so brittle that any little change in our code broke them, even though the code was ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required